77422009813 has 2 divisors, whose sum is σ = 77422009814. Its totient is φ = 77422009812.

The previous prime is 77422009811. The next prime is 77422009919. The reversal of 77422009813 is 31890022477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57820049764 + 19601960049 = 240458^2 + 140007^2 .

It is an emirp because it is prime and its reverse (31890022477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77422009813 - 2¹ = 77422009811 is a prime.

Together with 77422009811, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 77422009813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77422009811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38711004906 + 38711004907.

It is an arithmetic number, because the mean of its divisors is an integer number (38711004907).

Almost surely, 2^77422009813 is an apocalyptic number.

It is an amenable number.

77422009813 is a deficient number, since it is larger than the sum of its proper divisors (1).

77422009813 is an equidigital number, since it uses as much as digits as its factorization.

77422009813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 77422009813 in words is "seventy-seven billion, four hundred twenty-two million, nine thousand, eight hundred thirteen".